Finding the Fourth Proportional to 1,019.59, 1,528.27 and 472.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.59 : 1,528.27 = 472.10 : x
2. Step 2: Convert to fraction form
   1,019.59/1,528.27 = 472.10/x
3. Step 3: Cross multiply
   1,019.59x = 1,528.27 × 472.10
4. Step 4: Simplify right side
   1,019.59x = 721,487.45
5. Step 5: Solve for x
   x = 721,487.45/1,019.59
6. Step 6: Final answer
   x = 707.63